# Hot Tub Chemical Calculator

> Calculate and log hot tub, spa, and pool chemical maintenance.

Canonical page: [https://chrome-stats.com/d/com.patchmedia.hottubchemicalcalculator](https://chrome-stats.com/d/com.patchmedia.hottubchemicalcalculator)

## Overview

- **ID:** `com.patchmedia.hottubchemicalcalculator`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** PatchMedia
- **Category:** HOUSE\_AND\_HOME
- **Downloads:** 4
- **Version:** 1.0.0
- **Last updated:** 2026-08-13
- **First published:** 2026-08-13
- **Publisher country:** CA
- **Size:** 26 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.patchmedia.hottubchemicalcalculator)
- **Website:** [https://patch-media.com/apps/hot-tub-chemical-calculator/](https://patch-media.com/apps/hot-tub-chemical-calculator/)
- **Privacy policy:** [https://patch-media.com/privacy-policy.html](https://patch-media.com/privacy-policy.html)

## Description

Hot Tub Chemical Calculator keeps water-test readings, transparent dose estimates, and routine care in one calm local log.<br><br>Set up your tub volume, then record the chemistry you actually test: pH, total alkalinity, sanitizer, calcium hardness, temperature, and notes. Review the latest snapshot from the dashboard, compare readings over time, and reopen saved tests or dose details whenever you need them.<br><br>The built-in alkalinity and calcium-hardness calculators keep the important context visible: tub volume, current and target readings, product label rate, strength, amount, units, formula source, rounding, and assumptions. Results are estimates—not a certification of water condition. Product labels and manufacturer directions always take precedence.<br><br>Stay organized with:<br>• Fast water-test entry<br>• A searchable hot tub chemical log for tests and doses<br>• Chemistry trends with target context<br>• A practical spa maintenance log with recurring tasks<br>• Optional maintenance notifications<br>• CSV export through Android&#39;s document picker<br>• Valid local backup restore and delete-all controls<br>• Light, dark, US, and metric display settings<br><br>The free app supports one tub, complete core logging, both built-in calculators, 30-day trends, basic reminders, CSV export, restore, and delete-all controls.<br><br>Hot Tub Chemical Calculator Pro is a one-time Premium unlock. It adds multiple tubs, per-tub custom target ranges, saved custom products and supported label rates, longer trend ranges, advanced reminder recurrence, PDF service history, and local backup creation. It is not a subscription, and the app contains no ads.<br><br>This focused spa chemical calculator is built for hot tub owners who want quick calculations and durable records without an account-first platform. Your records stay on your device unless you explicitly export or back them up. There is no PatchMedia cloud sync, analytics SDK, or advertising SDK.<br><br>Hot Tub Chemical Calculator is an informational utility. Always follow product labels, test between adjustments, and use local professional guidance when needed.

## Rankings

- #2,984,247 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.RECEIVE_BOOT_COMPLETED`
- `android.permission.VIBRATE`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.patchmedia.hottubchemicalcalculator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.patchmedia.hottubchemicalcalculator)